Universal angle-plate.



J. R. BECKETT.

UNIVERSAL ANGLE PLATE.

APPLICATION FILED ocT. 4. 1913.

. Patented UCI. 5,1915.

2 SHEETS-SHEET l.

wu re #o @Ev A NPI en m V nlm /n /J v6 e J.. R. BECKETT. UNIVERSAL ANGLEPLATE.

APPLICATION FILED OCT. 4, 1913.

",1915. SHEET 2.

Patented Oct.

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/vw enor. JEH/Y RBEQKETT,

' JOHN B. BECKETT, 0F BOSTON, MASSACHUSETTS.

UNIVERSAL ANGLE-PLATE.

To alt whom t may concern:

Be it known that I, JOHN R. BECKETT, a citizen of the United States, andresident of Boston, county of Suffolk, State of Massachusetts, haveinvented an Improvement in Universal Angle-Plates, of which the fol-Vlowing description, in connection with the accompanying drawings, is a.specification, like characters on the drawings representing like parts.

The present invention relates to so-called plates or blocks adapted tohold work pieces more especially of'vmetal in position to be operated onfor any desired machining operation such as facing,` slotting, boring,milling and the like.

A prime object of the invention is to provide a work holding plate orsupport of this kind having a capacity of universal adjustment topresent the work in any desired relation to the tool, while at the sametime oifering an absolutely rigid unyielding backing to the work piecewhereby chattering is minimized and any displacements of the work in themachining operation prevented with certainty.

In accordance with my invention while t-he work is held rigidly andsecurely and with a capability of being swung or tilted to any desiredangle for presentation to the tool, the parts of the device are soarranged -that the lower or supporting parts whereon the work holdingblock proper is'adjustable, do not project so as to be in the way of thetool or interfere with the operation thereof at any time.

The above and other objects and features of the invention will be betterunderstood from the following detailed description taken in connectionwith the accompanying drawings and will be thereafter pointed out in theappended claims.

Referring to the drawings: Figure 1 is a side elevation showing apreferred form of my improved device with the work holding block properat or near one extreme of its range of tilting adjustment; Fig. 2 isasimilar view showing the work holding block at or near the other limitof its range of adjustment; Fig. 3 is a plan view illustrating thecapacity of the device for adjustment about a vertical axis; Fig. 4 is aside elevation showing the work holding block with its face vertical;Fig. 5 is a front view looking from the right in Fig. 4; Fig. 6 is asectional view on line 6 6 of Fig. 5; and fF ig.

` Specication of Letters Patent.

.Application led'Oetober 4, 1913. Serial No. 793,306.

Patented'oet. 5, 1915..

7 is a plan with the parts corresponding in position to Figs. 4 and 5.

A base piece or stand 10 of usual form having parallel top and bottomfaces is provided, this being set upon or secured to the table of thelmachine in proper position relative to the tool. On this base stand isfitted a rest backing 11 with a capability of ad-l justment about avertical axis 12, this back ing. rest being held to the stand base inits various adjusted positions by T headed bolts i' 13 fitted in anundercut annular slot 14 in the base stand as is usual. The rest backing11 is formed with an arcuate backing surface 15 shown as a substantiallyquadrantal curve extending from the horizontal at the front of thedevice to thevertical at a point shown as substantially directly overthe axis of vertical adjustment 12. To this'backing surface is fittedthe work holding block 16 having its back 17l formedon a substantiallysemi-cylindrical curve corresponding to that of the seat which it is toit. As a means for clamping the block 16 securely to its seat on thebacking piece 11 I provide near the ends of said block,l peripheralundercut grooves 1s, 19, in which fic Curved T nuts of bolts' 2o,

l 21, shown as passed through the heavy arcuate flange constituting theseat 15, near the ends thereof.

As a means for further guidin .the block 16 in its tilting adjustment anto insure accuracy of the same, I 'preferably provide a peripheral slot22 intermediate the length thereof with a corresponding opposite slot'23 in the rest backing and fit into one of said slots, preferably -thelatter, a rib piece 24 which, closely itting the other slot, accuratelyguides the block as it swings. The work holding piece 16 preferably hasits face equipped with undercut T'slots 25 or like provision forclamping the work thereto. As best seen in Figs. 3 and 5 the heavyarcuate fiange constituting the quadrantal seat 15 extends the fulllength of the block 16, and this block is as shown substantially longerthan the width across its face.

By reference to the different positions of block 16 as 'shown forexample in Figs. '1, 2 and4, it will be seen that the work clamped tothe face of said block maybe held at any position of tilting adjustmentdesired, from the one'extreme where the work supporting face overhangsthe vertical as in Fig. 1 to the other extreme where it is tilted up infront beyondthe horizontal as in Fig. 2, and

that throughout this range of tilting adjustment there is at all times awide, rigid, and substantial backing of the work and its supportingblockll against substantially the full quadrantal surface 15 throughoutthe width and length thereof.

lt is to be particularly noted that in my improved construction byreason of the fact that the arcuate cradle seat is substantially forwardof the vertical axis, as shown, substantially ltangential thereto, inconnection with the plane fiat work receiving face, it is possible tofix Work pieces of any size and with projecting parts, to the workreceiving face and bring the same to any angle Whatsoever desiredwithout hindrance by any portion of the work coming against any part ofthe cradle or base; i. e., the work receiving face can be adjustedthrough substantially a quadrant in anydirection without having any partof the cradle or base support projected into the plane thereof. It is tobe further observed that in all this range of tilting adjustment ofblock 16, the underneath supporting parts, z'. e., the rest backing 11andv the base stand 10 do not project forward at any time in a manner tointerfere with the operation of the tool; on the other hand throughoutmost of the range of adjustments the work supporting block 16, thoughrigidly and'strongly supported, projects out some little distance infront of the parts 10, 11, thus permitting the tool to attack the Workclamped to the face of said block at all times to the best advantage. Byreason of the quadrantal form of the backing surface 15 which thusconstitutes what may be termed a cradle rest, there is always a portionof said rest extending'at least to a point substantially back f of thecenter of block 16 and thusadapted to receive andv withstand the workingthrusts. It is to be observed that the arrangement of the arcuate yrest15 extending as 1t does from a point substantially di.

rectly above, the center of verticalv adjustment 12 downwardly andforwardly to the Ato front ofthe device, causes the working thrusts' andstrains to be transmitted` to thel stand piece 10 in/a manner so thatthey are taken up and dissipated most advantageously.

By referring to Figs. 1 and v2 itwill be seen that by reason of the factthaty axis 12 and on the arcuate cradle rest 15, to be of specialvalueand importance in the combination wherein such cradle rest formedon the backing 11 constitutes a part, for the reason that this providesa work holding plate having at the same time the attributes of rigidityand strength to a high degree along with the capability of universaladjustment to present the work in any required manner tothe tool. Ipreferably provide suitable graduations as shown to indicate the extentof angular adjustments in each direction.

I am Aaware that thefinvention can be embodied in other specific formsas to various details without departing from the spirit thereof and ltherefore do not desire to be limited to the precise embodiment hereinshown but desire such embodiment to be considered as illustrative andnot restrictive and refer to the appended claims rather than to theforegoing description to indicate lthe scope of the invention.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. A universal work holder for metal working machines, comprising 'ablock hava plane work receiving face with provision for clamping workthereto and a back of part cylindrical form, a backing member formedwith' an extended arcuate seat for said block, said parts being arrangedto permit adjustment of said block abouta horizontal axis, and beingequipped with T-bolt clamping means for clamping said block to saidmember in any adjusted position, and means for rigidly holding saidbacking member with a capability of angular adjustment about a verticalaxis, said -means including T-bolt clamps operative in an annular slot,said vertical axis being substantially farther back than said horizontalaxis, said block and backing member and the holding means therefor beingso proportioned and disposed that the` work receiving face may beadjusted through substantially a quadrant in any direction before anyother part is projected into the plane thereof.

2. A universal work holder for metal working machines, comprising ablock havinga plane work receiving face and a back mit adjustment ofsaid block about a horizontal axis, l'bolt means for clamping said blockto said backing member, andl .means includinga T-bolt clamp for rigidlyholding said backing member with a capability of angular adjustmentabout a vertical axis, said vertical axis being approximately in a linetangential tol said arcuate seat, said block and backing member and theholding ieu means therefor being so proportioned and M3@ disposed thatthe Work receiving face may be adjusted through substantially a quad'-rant in any direction before any other part is projected into the planethereof.

horizontal adjustment having |"bolt clampi ing means engaged with the.periphery thereof for clamping it 'to said seat, said.l

block being so mounted that its face may be adjusted through an angleof. substantially ninety degrees in any direction before said base orsaid cradle seat'is projected into the plane of said face.

In testimony whereof, I have signed my name to this specification, inthe presence of 25 two subscribing Witnesses;

` JOHN-R.4 BECKETT. Witnesses: i

LOUISE A. JORDAN, CLYDE L. ROGERS.

